ML145502 Datasheet, PDF (19/26 Pages) LANSDALE Semiconductor Inc. – PCM Codec-Filter Mono-Circuit

ML145502, ML145503, ML145505
LANSDALE Semiconductor, Inc.
R0 = 600 Ω R0 = 900 Ω
R0
– 48
N=1
N=1
R5
N=2
R6
R0
VSS
R4
R3
+ Vref
RSI
VAG
VDD
RxO
RDD
RxG
RCE
RxO
RDC
+ Tx
TDC
R2
R1
NOTE: Balance by R5 and R6 to equate the Txl gains through the inverting
and non–inverting input signal paths, respectively, is given by:
R1 _{1 –} R3 _{= 1 +} R1
R6 _– R3
R5
2 × R2
R4
R2 R5 + R6 R4 R5 + R6
Tx Gain = R1/R2
Rx Gain = 1 + R3/R4
R5, R6 ≈ 10 kΩ
Adjust Rx Gain with R3
Adjust Tx Gain with R1
TxI
CCI
– Tx
TDD
Mu/A
TDE
PDI
MSI
VSS
VLS
ML145502
24a. Universal Transformer Hybrid Using ML145502
T
R0
– 48
R
R0 = 600
N=1
N=1
N=2
10 kΩ
20 kΩ
R0
10 kΩ
VSS
20 kΩ
+ Vref
RSI
VAG
VDD
RxO
RDD
RxG
RCE
RxO
RDC
+ Tx
TDC
TxI
CCI
– Tx
TDD
Mu/A
TDE
PDI
MSI
VSS
VLS
ML145502
24b. Single–Ended Hybrid Using ML145502
R0 = 900
Figure 24. Hybrid Interfaces to the ML145502 PCM Codec–Filter Mono–Circuit
Page 19 of 26
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